For some reason, it means a skinnier ugly chick than a grenade which makes no fucking sense because you would think that since a land mine is more lethal and cheap and worse than a grenade for many reasons, that it would instead mean an even fatter ugly chick than a grenade, but for some reason, it means the exact opposite. Another reason why Jersey Shore is the stupidest fucking show ever that should be wiped off the face of the earth, and whoever watches that god awful excuse for a show is a stupid fucking trendster.

>Hey, look at that Land Mine over there

>>You mean that grenade?

>Nah, she's too skinny to be a grenade

>>wtf? but...land mines are deadlier than grenades, why is she called a landmine?